نتایج جستجو برای: n80 80 and n160160 kg n ha

تعداد نتایج: 16997326  

2008
R.E.J. Boerner Jianjun Huang Stephen C. Hart

The Fire and Fire Surrogates (FFS) network is composed of 12 forest sites that span the continental United States, all of which historically had frequent low-severity fire. The goal of the FFS study was to assess the efficacy of three management treatments (prescribed fire, mechanical thinning, and their combination) in reducing wildfire hazard and increasing ecosystem sustainability. This pape...

Journal: :International Journal of Enviornment and Climate Change 2023

The field experiment entitled “Influence of Biofertilizers and Nitrogen on the Growth Yield Barley (Hordeum vulgare L.)" was conducted during Rabi season, 2022 at Crop Research Farm in Department agronomy, Naini Agriculture Institute, Sam Higginbottom University Agriculture, Technology Sciences, Prayagraj Uttar Pradesh. study included biofertilizers three levels (60, 80 100 kg/ha) control. layo...

Journal: :International Journal of Plant and Soil Science 2022

The field experiment were conducted during 2013-14 and 2014-15 to study the effect of drip fertigation on nutrient availability, plant parameters yield cauliflower. experiments laid out in randomized block design with four replications six levels (60, 70, 80, 90, 100 110 per cent recommended dose). Recommended doses N, P K are 125, 108 76kg/ha, respectively for cauliflower Himachal Pradesh. Fer...

Journal: :Journal of environmental quality 2004
R D Harmel H A Torbert B E Haggard R Haney M Dozier

When improperly managed, land application of animal manures can harm the environment; however, limited watershed-scale runoff water quality data are available to research and address this issue. The water quality impacts of conversion to poultry litter fertilization on cultivated and pasture watersheds in the Texas Blackland Prairie were evaluated in this three-year study. Edge-of-field N and P...

ژورنال: علوم آب و خاک 2018

The effect of broad-leaved forest trees (Alnus glotinusa, Ulmus glabra, Popolus caspica and Parrotia persica) and their canopy position on soil C and N storage and mineraization in the plain forest areas of Noor was investigated. Soil samples were taken from two positions (near and away from the main stem) with the microplots of 30×30×15 cm. Litter (C and N), soil physical (bulk density, textur...

Journal: :پژوهش های کاربردی زراعی (زراعت سابق) 0
امیرهوشنگ جلالی مرکز تحقیقات کشاورزی و منابع طبیعی استان اصفهان محمد جعفر بحرانی استاد بخش زراعت و اصلاح نباتات دانشکده کشاورزی دانشگاه شیراز

nitrogen is one of the most limiting nutrients for cereal production in many parts of iran. the effects of crop residue incorporation [0 (control), 25 and 50% of wheat (triticum aestivum l.)] and nitrogen (n) levels (0, 150, and 300 kg ha-1) on corn (zea mays l.) grain yield and nitrogen use efficiency were investigated at agricultural research station, shiraz university, shiraz, iran for two y...

2013
Faisal Elgasim Ahmed

A field experiment was conducted for two consecutive seasons (2009/10 and 2010/11) in the Demonstration Farm of the Faculty of Agriculture at Shambat-Sudan, to study the interactive effect of nitrogen fertilization and rhizobium inoculation on nodulation and yield of soybean (Glycine max [L.] Merrill) plants. The experiment was laid out in a randomized complete block design with four replicatio...

2013
M. I. Tajul M. M. Alam S. M. M. Hossain K. Naher M. Y. Rafii M. A. Latif

Field experiments were conducted to evaluate plant population and N-fertilizer effects on yield and yield components of maize (Zea mays L.). Three levels of plant populations (53000, 66000, and 800,000 plants ha⁻¹ corresponding to spacings of 75 × 25, 60 × 25, and 50 × 25 cm) and 4 doses of N (100, 140, 180, and 220 kg ha⁻¹) were the treatment variables. Results revealed that plant growth, ligh...

2008
William H. Schlesinger John T. Gray

Assistant Professor of Botany, Duke University, Durham, N.C. 27706; and Research Assistant, Department of Biological Sciences, University of California, Santa Barbara, CA 93106 Abstract: Precipitation and dry fallout were collected over a 2-year period at a remote site in the Santa Ynez Mountains, Santa Barbara County, California, USA and analyzed for nutrient content. Mean annual depositions o...

2004
F. Nevens

On a Flemish sandy loam soil, cut and grazed swards were compared at different levels of mineral nitrogen (N) fertilization. Economically optimal N fertilization rates were 400 (or more) and 200 kg N ha yr on cut and grazed swards respectively. Considering the amounts of residual soil nitrate-N in autumn, these N rates also met the current Flemish legal provisions, i.e. no more than 90 kg ha ni...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید